- HR zone training is worthless for like 99% of the population and is a boon on beginner runners who don't know better than to spend money on gadgets and plans
- Consistent small to medium doses of "quality" running far outweigh 2 big, tough sessions per week for distances 5k and down.
- Speed reserve is very real and too many people think they can ignore it. The faster your max speed, the easier it is to maintain sub-maximum speeds. Obviously doesn't scale infinitely, e.g. Usain Bolt would be a poor marathoner, duh. But if you take two guys, one runs a 50 flat 400 and the other runs a 60 flat 400, the 50 flat 400 guy has LOADS more potential than the 60 flat guy over most distances.
- Not even bro science but lifting weights is significantly safer than distance running. The amount of distance runners that think touching a barbell will result in them injured are already incredibly fragile and unathletic and probably need the stimulus of lifting more than anyone.
- Overall athleticism is extremely important, especially early on in your running career. Someone who can jump and throw and hop and bounce and lift and of course run has way more potential than someone who only knows how to do running training.